Regulation Of Crop Growth Mepiquat Chloride 98%TC,250g/L CASNO.24307-26-4 For Cotton And Wheat

Mepiquat chloride mainly exerts its effect through foliar spraying, a method that enables crops to absorb the agent quickly and efficiently. The specific usage methods vary slightly among different crops and need to be flexibly adjusted according to the crop type and growth stage:​

For cotton, the optimal spraying period is from the seedling stage to the early flowering stage. At this time, the cotton plant is in a critical stage of transition from vegetative growth to reproductive growth, and the recommended concentration is 20-50mg/L. If the cotton plant grows vigorously with dark green leaves, it can be sprayed twice at an interval of 7-10 days; if the growth is moderate, once is sufficient. When spraying, focus on the upper leaves of the cotton plant, which can effectively inhibit the excessive elongation of the main stem and fruit branches, avoid field closure caused by "excessive growth", promote the transportation of nutrients to the cotton bolls, and improve the boll setting rate and boll weight.​

For wheat and corn, spraying should be carried out during the jointing stage. Spraying mepiquat chloride at a concentration of 30-50mg/L on wheat during the jointing stage can shorten the length of the basal internodes, enhance the toughness of the stems, reduce the risk of lodging in the later stage, and promote tillering and heading. For corn, the recommended concentration is 40-60mg/L. Spraying before the rapid elongation of the stems can lower the center of gravity of the plant, reduce lodging caused by wind and rain, coordinate nutrient distribution, and increase the number of grains per ear. Generally, one spray per crop in a single season can achieve the ideal effect.​

In fruit and vegetable crops, the usage methods vary slightly by variety:​

1.Solanaceous fruits such as tomatoes and peppers: Spray at the early flowering stage, with the concentration controlled at 20-40mg/L, which can promote flower bud differentiation, reduce flower and fruit drop, and make the fruits expand evenly. If the growth is too vigorous, a supplementary spray can be done at an interval of 10-14 days, but attention should be paid to avoiding excessive concentration which may cause fruit deformity.​

2.Grapes: Spray the liquid at a concentration of 20-30mg/L when the new shoots grow to 30-50 cm, which can inhibit the excessive growth of new shoots, concentrate nutrients to supply the inflorescences, improve the fruit setting rate and fruit sweetness, and reduce the workload of later pruning.​

3.Potatoes: Spray at a concentration of 30-50mg/L in the early stage of tuber formation, which can inhibit the excessive growth of the above-ground parts, promote the transfer of photosynthates to the tubers, and increase the weight and quantity of tubers.

The application of mepiquat chloride in agricultural production is based on its ability to precisely regulate crop growth. Through scientific and reasonable application, it achieves the goal of improving crop quality and increasing yield. The specific application scenarios and operations are as follows:​

In large - area farmland cultivation, mepiquat chloride is widely used. For large - scale cotton bases, growers will carry out foliar spraying at a concentration of 20 - 50mg/L from the seedling stage to the early flowering stage. When the cotton plants grow vigorously, they are sprayed twice with an interval of 7 - 10 days. This can effectively control the excessive growth of cotton plants, improve the ventilation and light transmission in the field, reduce the breeding of diseases and pests, provide a good environment for the growth and development of subsequent cotton bolls, and thus improve the yield and quality of cotton.​

In the cultivation of wheat and corn, the application of mepiquat chloride can effectively solve the problem of lodging. During the jointing stage of wheat, farmers will spray at a concentration of 30 - 50mg/L. Within a few days, it can be observed that the basal internodes of wheat are shortened, the stems

become thick and strong, which greatly reduces the possibility of lodging in the later stage when encountering wind and rain, and at the same time promotes more tillers to form ears, increasing the yield. For corn cultivation, before the stems elongate rapidly, it is sprayed at a concentration of 40 - 60mg/L, which lowers the center of gravity of the corn plants, enhances the lodging resistance, and enables nutrients to be more concentrated in the ears, increasing the number of grains per ear.​

For fruit and vegetable growers, mepiquat chloride is a good helper to improve the quality and yield of fruits and vegetables. In the cultivation of solanaceous vegetables such as tomatoes and peppers, after spraying 20 - 40mg/L of mepiquat chloride at the early flowering stage, the number of fallen flowers is reduced, the fruit setting rate is significantly increased, the fruits are uniform in size, and the commodity value is greatly improved. If the vegetables grow too vigorously, a supplementary spray can be done at an interval of 10 - 14 days, which can effectively control vegetative growth and make more nutrients flow to the fruits.​

In grape cultivation, when the new shoots grow to 30 - 50 cm, spraying 20 - 30mg/L of mepiquat chloride can inhibit the excessive growth of new shoots, and nutrients are concentrated in the inflorescences. This not only improves the fruit setting rate, but also makes the grapes sweeter. Moreover, it reduces the workload of later pruning and lowers the planting cost. Potato growers spray 30 - 50mg/L of mepiquat chloride in the early stage of tuber formation to inhibit the excessive growth of the above - ground parts, so that more organic matter produced by photosynthesis is transported to the tubers, making the tubers larger and more numerous, and increasing the harvest.​

In the actual application process, farmers will strictly follow the application points, choose the appropriate time for spraying, and ensure that the liquid medicine evenly covers both the front and back of the leaves. At the same time, according to the local soil and climate conditions, a small - area test is carried out first, and then applied on a large scale to achieve the best regulatory effect. Through the scientific application of mepiquat chloride, the growth situation of various crops has been optimized, bringing significant economic benefits to agricultural production.

Although mepiquat chloride is a high-efficiency and low-toxicity plant growth regulator, it is still necessary to strictly follow the operation specifications during use to ensure its effectiveness and avoid adverse effects. The specific matters needing attention are as follows:​

1.Strictly control the concentration and dosage​

Different crops and growth stages have great differences in tolerance to mepiquat chloride. It must be sprayed according to the recommended concentration, and the dosage should not be increased at will. For example, if the concentration of cotton at the seedling stage exceeds 50mg/L, it may lead to stagnation of plant growth; excessive concentration in fruit and vegetable crops is likely to cause fruit deformity. If it is necessary to adjust the concentration, it is necessary to combine the results of small-area tests and gradually fine-tune according to the crop reaction.​

2.Grasp the best application time​

Spraying after missing the key growth period will reduce the effect. For example, wheat needs to be used before the jointing stage; if it is delayed until the booting stage, it may affect the development of the ear; the effect of controlling excessive growth will be greatly weakened if grapes are sprayed after the new shoots exceed 50 cm. At the same time, avoid spraying in high-temperature and strong light (noon) or rainy weather. High temperature is easy to cause the liquid to evaporate too quickly and burn the leaves, while rainy weather will cause the liquid to lose and reduce the utilization rate.​

3.Standardize operation and uniform spraying​

Before spraying, the liquid must be fully stirred to ensure uniform concentration. When spraying, aim at both sides of the crop leaves, especially

the vigorous young parts, to improve the absorption efficiency. Avoid missing or re-spraying. Missing spraying will lead to uneven regulation, while re-spraying may cause excessive local dosage and cause phytotoxicity.​

4.Pay attention to crop sensitivity and mixing taboos​

Some crops are more sensitive to mepiquat chloride, such as beans and watermelons. Before use, it is necessary to confirm their applicability to avoid blind spraying. In addition, mepiquat chloride cannot be mixed with alkaline pesticides (such as Bordeaux mixture and lime sulfur mixture) to avoid chemical reactions that reduce the efficacy; when mixing with other foliar fertilizers or regulators, compatibility tests should be carried out first (such as standing to observe whether there is stratification or precipitation).​

5.Do a good job in safety protection and environmental management​

When applying pesticides, protective equipment such as gloves and masks should be worn to avoid contact with the skin or inhalation of the liquid into the respiratory tract. Clean the appliances and clothes in time after application. The remaining liquid must not be poured at will and should be properly handled to prevent pollution of soil and water sources. Pregnant women, lactating women and people with allergic constitution should avoid participating in pesticide application operations.​

6.Storage and shelf life management​

Mepiquat chloride should be sealed and stored in a cool, dry and ventilated place, away from children, food and feed, and avoid direct sunlight and high-temperature environment. Pay attention to check the product shelf life. Expired pesticides must not be used to avoid reduced efficacy or phytotoxicity due to component decomposition.​

7.Measures to deal with phytotoxicity​

If phytotoxicity occurs accidentally (such as leaf curling and growth stagnation), stop using it immediately, water in time to dilute the liquid, and spray alleviators such as brassinolide and amino acid foliar fertilizer to promote the recovery of crops.​

Following the above precautions can maximize the regulatory effect of mepiquat chloride and ensure the safe growth of crops and the sustainability of agricultural production.

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